/**
 * (C) Copyright IBM Corp. 2010, 2015
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 */

package com.ibm.bi.dml.runtime.matrix.data;

import java.io.IOException;

import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.mapred.FileOutputFormat;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.RecordWriter;
import org.apache.hadoop.mapred.Reporter;
import org.apache.hadoop.util.Progressable;

public class UnPaddedOutputFormat<K extends Writable, V extends Writable> extends FileOutputFormat<K, V>
{	
	
	public static class UnpaddedRecordWriter<K extends Writable, V extends Writable> implements RecordWriter<K, V>
	{
		/** file input stream */
		private FSDataOutputStream out;

		public UnpaddedRecordWriter(FSDataOutputStream fstream)
		{
			out=fstream;
		}
		@Override
		public void close(Reporter report) throws IOException {
			out.close();
			
		}
		@Override
		public void write(K key, V value) throws IOException {
			key.write(out);
			value.write(out);
		}
	}

	@Override
	public RecordWriter<K, V> getRecordWriter(FileSystem ignored, JobConf job,
			String name, Progressable progress) throws IOException {
		Path file = FileOutputFormat.getTaskOutputPath(job, name);
	    FileSystem fs = file.getFileSystem(job);
	    FSDataOutputStream fileOut = fs.create(file, true, job.getInt("io.file.buffer.size", 4096), progress);
		return new UnpaddedRecordWriter<K, V>(fileOut);
	}
}